CHE 111 C3--Stoichiometry: Question Preview (ID: 9356)


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CO2 + CaO = CaCO3 is an example of which reaction type?
a) combination b) decomposition c) combustion d) displacement
Is this reaction balanced? C4H10 + 13 O2 = 4 CO2 + 5 H2O
a) yes b) no c) d)
What is the % O in NaNO2?
a) 32% b) 23% c) 20% d) 46%
How many H atoms are in 3 moles of NH3?
a) 1.8 x 10^24 b) 5.4 x 10^24 c) 3.6 x 10^24 d) 6.02 x 10^23
What is the mass of 1.2 x 10^24 molecules of H2O?
a) 36 g b) 18 g c) 6.02 x 10^23 g d) 2.2 x 10^25 g
2 Na + Cl2 = 2 NaCl is which reaction type?
a) combination b) decomposition c) combustion d) displacement
The actual yield of a chemical reaction is almost always more than the theoretical yield.
a) True b) False c) Not enough information d)
2 H2 + O2=2 H2O How many moles of water can be produced from the reaction of 6 mol H2 and 3 mol O2?
a) 1 b) 2 c) 9 d) 6
2 H2 + O2 = 2 H2O. If 0.5 mol H2 and 0.5 mol O2 react, what is the excess reactant?
a) H2 b) O2 c) H2O d)
When Al + O2 = Al2O3 is balanced, the coefficient in front of Al2O3 is
a) 1 b) 2 c) 4 d) 6
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